Advantages of a New Type of Riegel Attachment

抄録

Purpose : There is a wide variety of patterns for retainers used in partial dentures. In these patterns, most of the retentive mechanisms apply friction, mechanical interlocking force or resilience. In contrast to these methods, there is a mechanical retention system that utilizes a retentive projection to latch onto another projection without applying any force. This system is the riegel precision attachment. However, a more complicated technique using high-precision devices is required to fabricate this riegel precision attachment, which is more troublesome to work with during laboratory operations. The new Suginaka riegel system was designed to facilitate laboratory operations and simplify laboratory processes and clinical handling.
Methods : The Suginaka riegel consists of a sheath case in which an easily retractable lever is placed in advance. The retentive section of the lever is connected to a projection on an abutment tooth. The denture is inserted or removed from the mouth by protracting or retracting the lever.
Results : The Suginaka riegel can avoid the most difficult laboratory process of incorporating the lever that retracts or protracts the hook smoothly, such as is found with the conventional riegel attachments. Because it is different from retainers that apply friction or interlocking force and resilience, no prosthetic injuries are sustained by the abutment tooth even during functioning and placement or removal of the denture because no detrimental force was applied to the abutment tooth.
Conclusion : The use of the Suginaka riegel simplifies laboratory processes, and the latch mechanism works reliably without the necessity for complicated laboratory techniques.